Unaudited Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Cash flows from operating activities
Net increase (decrease) in net assets resulting from operations	$ 173	$ 199
Adjustments to reconcile net increase (decrease) in net assets resulting from operations to net cash provided by (used in) operating activities:
Purchases of investments	(1,444)	(270)
Paid-in-kind interest	(25)	(28)
Proceeds from sales and repayments of investments	1,855	386
Net realized (gain) loss on investments	243	58
Net change in unrealized (appreciation) depreciation on investments	(186)	(31)
Net change in unrealized (appreciation) depreciation on foreign currency forward contracts	(8)	4
Accretion of discount	(15)	(15)
Amortization of deferred financing costs and discount	4	4
Unrealized (gain)/loss on borrowings in foreign currency	(11)	4
(Increase) decrease in receivable for investments sold and repaid	(83)	7
(Increase) decrease in income receivable	(10)	(48)
(Increase) decrease in prepaid expenses and other assets	(2)	2
Increase (decrease) in payable for investments purchased	0	(14)
Increase (decrease) in management fees payable	(1)	(1)
Increase (decrease) in subordinated income incentive fees payable	2	19
Increase (decrease) in administrative services expense payable	1	1
Increase (decrease) in interest payable	(7)	(16)
Increase (decrease) in other accrued expenses and liabilities	(20)	(14)
Net cash provided by (used in) operating activities	466	247
Cash flows from financing activities
Repurchases of common stock	0	(32)
Stockholder distributions	(210)	(192)
Borrowings under financing arrangements	1,019	360
Repayments of financing arrangements	(1,263)	(382)
Deferred financing costs paid	(1)	(2)
Net cash provided by (used in) financing activities	(455)	(248)
Total increase (decrease) in cash	11	(1)
Cash, and foreign currency at beginning of period	231	251	$ 251
Cash, and foreign currency at end of period	242	250	$ 231
Supplemental disclosure
Non-cash purchases of investments	(423)	(19)
Non-cash sales of investments	423	19
Local and excise taxes paid	23	19
Interest paid during the period	$ 119	$ 126